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距离选通水下激光成像系统是一种基于时间标记原理的水下光电成像系统,它能够有效抑制水体后向散射光的干扰,提高目标探测距离,具有较高的军事和民用价值。在距离选通水下激光成像系统中,ICCD可能接收到的光信号包括水体后向散射光、目标反射直射光、以及目标反射光的前向散射光。建立了ICCD接收信号光能量的几何模型,在给定开门时刻和选通门宽参数条件下,给出了通过点扩散函数计算ICCD像元上所能接收到的目标反射光的直射光及其所引起的水体前向散射光能量的方法,以及通过水体分层计算水体后向散射光的方法,定义了距离选通水下激光成像系统信噪比,分析了目标距离对信噪比的影响并给出了仿真结果。
The gated underwater laser imaging system is an underwater photoelectric imaging system based on time-stamping principle. It can effectively restrain the interference of backscattered water and improve the target detection range, which has high military and civilian value. In a gated underwater laser imaging system, the optical signals that the ICCD may receive include backscattered water bodies, target reflected direct light, and forward scattered light from the target reflected light. The geometrical model of the energy of the ICCD received signal is established. Under the condition of the open door time and the gate width parameter, the direct light which can receive the target reflected light on the ICCD pixel through point spread function is given and its And the method of calculating the backscattered light through the stratification of water body, the signal-to-noise ratio of the underwater gated laser imaging system is defined and the influence of the target distance on the signal to noise ratio is analyzed The simulation results are given.